1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604cc4238a3c75f8c46de5f77ad7898f00d7603b50ed9fcfa473a432f793e93b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0618804f-da03-40cc-8168-fe5be0c74da5.json and https://artists.proofprofile.net/proofs/artist/0618804f-da03-40cc-8168-fe5be0c74da5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffb4d4401cabab1842724842ebbbded936f8a43a4c3fb9525f47a6c77713215. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f7cd85e7578ae983839f7ad9088df6841e9c2c17289fe74b3ce57f3cce553. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR39801485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddab59a4c0b0ba2b0226161c566438044a4d4275fca3e41de0e643ee05b0dd3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f685dd000c2802aa7a33be72f15d977647478d73526dc878ea3d710d6582d54. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR39800526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae96eba734d9ebfd4caa0adec37635490cd5a1bf686f0fc289493ba27a422fa0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR39800542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1cf7cd8e017ea58251fd7acf5e980fb04c27146142bfa0cbf50c0745e4838. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbeab6b062edd0ee6b895acb8eb0bff97d7bf136ab5d57a1a460168c7ecbe48. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f03dd61f733bf9fc4364bd24fa7b57b340ba908e25777dbaeb2a3099e238da. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0675677761815a919dbd7139886d3e2ec96efd81dbaedd48ea60ca05d8ed5d05. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9306046378ae1d6ba431269461356e33b7ca2456d5b8a4a2d9461fa574755395. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df4c3820979fcc5f6dfc9b7d56b731573f0a9b2075c9b990f4220a2dc43df78. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMTR31600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65ed5d32eede9a06a2b38dd214c5bb8cf44dde95f9806268441d7778e58178c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62422639.